MIPS: arch-independent changes to support mips.

src/assembler.h

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // All Rights Reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 // - Redistributions of source code must retain the above copyright notice,
 // this list of conditions and the following disclaimer.
 //
@@ skipping 330 matching lines @@
   static const int kApplyMask;  // Modes affected by apply. Depends on arch.
 
  private:
   // On ARM, note that pc_ is the address of the constant pool entry
   // to be relocated and not the address of the instruction
   // referencing the constant pool entry (except when rmode_ ==
   // comment).
   byte* pc_;
   Mode rmode_;
   intptr_t data_;
+#ifdef V8_TARGET_ARCH_MIPS
+  // Code and Embedded Object pointers in mips are stored split
+  // across two consecutive 32-bit instructions. Heap management
+  // routines expect to access these pointers indirectly. The following
+  // location provides a place for these pointers to exist natually
+  // when accessed via the Iterator.
+  Object *reconstructed_obj_ptr_;
+  // External-reference pointers are also split across instruction-pairs
+  // in mips, but are accessed via indirect pointers. This location
+  // provides a place for that pointer to exist naturally. Its address
+  // is returned by RelocInfo::target_reference_address().
+  Address reconstructed_adr_ptr_;
+#endif  // V8_TARGET_ARCH_MIPS
   friend class RelocIterator;
 };
 
 
 // RelocInfoWriter serializes a stream of relocation info. It writes towards
 // lower addresses.
 class RelocInfoWriter BASE_EMBEDDED {
  public:
   RelocInfoWriter() : pos_(NULL),
                       last_pc_(NULL),
@@ skipping 475 matching lines @@
  public:
   NullCallWrapper() { }
   virtual ~NullCallWrapper() { }
   virtual void BeforeCall(int call_size) const { }
   virtual void AfterCall() const { }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_ASSEMBLER_H_